@article{
  author = {Shahbazi-Alavi, Hossein, Safaei-Ghomi, Javad, Talebi, Ruhollah},
  title = {PbWO4 nanoparticles: A robust and reusable heterogeneous catalyst for the synthesis of benzopyranopyridines under ultrasonic irradiation},
  journal = {Iranian Journal of Catalysis},
  year = {2017},
  volume = {7},
  number = {2},
  pages = {103-109},
  doi = {}
}